On Thu, Oct 04, 2001 at 05:56:42PM +0200, Egbert Eich wrote: > Chad Kitching writes: > > > > Another update on My Twinhead Powerslim 600 with the Cyber9525DVD: > > > > I changed the hsync hardcoded adjustment to 0 (it was initally 23) > > > > I left the vsync at -2. > > > > > > This will break it for others. We still don't know exactly how to > > > calculate these values exactly. > > > > I've done some playing around with my laptop based on a Trident > > Cyber9525DVD, and I'm beginning to believe that the CRTC values can't be > > correct. In particular, the CRTC values change from what X sets when I > > press Fn-F5 to switch displays, and when I plug these values into the LCD[] > > array, the overlay becomes centered properly (without modifying the > > h/vsync). I haven't managed to get 640x480 (unstretched) to work with the > > overlay, since I can't get the trident driver to set the "proper" values > > (e.g. the values I set in the LCD array end up being different from what > > gets programmed into the VGA CRTC registers). > > > > The CRTC values I'm getting from my card when I switch video outputs is the > > same ones that are '#if 0'ed out above the current LCD[] array. > > > > > > The current code doesn't take the horizontal sync skew (CRTC[5]5:6) > into account. This might have caused this problem. > I fixed this. Now we may have to retune the video skews. > > I agree, hotkey display switching will most likely mess up the > video offsets. The Xserver doesn't get notified when a switch happens > therefore we cannot adapt our values. I don't like to read back the > CRTC registers on every frame to see if they have changed. > Maybe I can add some code to do this every 100 or so frames. > Egbert - I hope we really don't have to kludge around like this, but if we do, you can check the current video output mode in the BlockHandler and use a callback to update values.
Alan. _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
